Q33 bus from LGA, get off last stop.
Go downstairs to METROCARD transfer to Coney Island bound E or F train.
Transfer at 14th Street to the L line towards Rockaway Parkway.
Bedford Ave is the first stop in Williamsburg.

Looking to fly into LaGuardia but stay in Manhattan and have a lunch meeting in Mahway, NJ, all in two days. Really don't want to rent a car, and airfare into Newark is double the price than into LaGuardia or JFK. I am traveling light and open to using the trains and subways,but could use a local's help in navigating the routes.